[CWP16H] Photon Emission Devices and Related Technologies

[CWP16H-01] Out-of-plane symmetry-protected bound states in the continuum in a plasmonic nanofin metasurface

Andreas Aigner², Juan Wang², Andreas Tittl², Stefan A. Maier^2,3, *Haoran Ren¹ (1. Macquarie University (Australia), 2. Ludwig-Maximilians-University Munich, Munich (Germany), 3. Imperial College London (UK))

[Presentation Style] Online

We present a plasmonic nanofin metasurface harnessing the out-of-plane symmetry breaking in parameter space by tuning the triangle angle of 3D laser nanoprinted polymer triangles (named as nanofins) coated with gold. The plasmonic nature of the out-of-plane symmetry-protected BICs enables high field enhancement together with high q-factors from the near- to mid-infrared regions, which were utilised for refractive index and pixelated molecular sensing.